Back in the day

Johnny Carson hosted NBC's The Tonight Show from 1962 to 1992. Carson had a very personable demeanor and wry sense of humor, and during his tenure, the show became America's most popular late-night program. Carson's Tonight Show was initially based in New York City, but in May 1972, it relocated to Burbank, California, where it remained for the rest of its run and continues today with its current host, Jay Leno. How many people tuned in to watch Carson's last show?

Feature

Deep brain stimulation is a medical treatment that involves the use of a device called a brain pacemaker, which sends high-frequency electrical impulses to specific parts of the brain via implanted electrodes. The technique has provided remarkable therapeutic benefits for otherwise treatment-resistant disorders such as chronic pain and Parkinson's disease, however, its underlying principles and mechanisms are still not clear, and there is potential for serious side effects, including what?

Born on a day like today

Matteotti was an Italian Socialist leader, member of parliament, and outstanding opponent of the Fascist regime during its early days. His death at the hands of Fascist hirelings precipitated a parliamentary crisis that Mussolini overcame by disavowing the murder and tightening police control. Mussolini's dictatorship may be said to have begun with the crushing of the opposition through Matteotti's assassination. Recent scholarship suggests what about Mussolini's involvement in the affair?